Kirkbya sp.

Tarnac, Anaëlle, Forel, Marie-Béatrice, Nestell, Galina, Nestell, Merlynd & Crasquin, Sylvie, 2021, Middle Permian ostracods (Crustacea) from the Guadalupe Mountains, West Texas, USA, European Journal of Taxonomy 770, pp. 1-60 : 15-16

Kirkbya sp.

Fig. 4R

Material examined

USA • 1 right valve; Guadalupe Mountains , West Texas, Williams Ranch Member , Cutoff Formation , Quarry section, sample GM1; Roadian, Middle Permian; MNHN.F. F63382 .

Remarks

The general outline of Kirkbya sp. is close to that of Kirkbya permiana (Jones, 1850) in Woszczyńska, 1987 from the Late Permian of Poland ( Woszczyńska 1987) and to Kirkbya bendensis Harlton, 1933 from the Pennsylvanian of USA ( Harlton 1933) but the ornamentation in the Texan specimens is very different by a very fine reticulation.

Occurrence

Sample GM1, Quarry section, Williams Ranch Member, Cutoff Formation, Guadalupe Mountains, West Texas, USA, Roadian, Middle Permian (this work).

Figures

Fig. 4 (next page). SEM micrographs of ostracods from the Middle Permian (Roadian, Quarry section, samples GM1, GM2, and GM4; Capitanian, MKCS1 section, samples 4 (GM5) and sample 2 (GM6)) of the Guadalupe Mountains (West Texas, USA). All specimens are temporarily housed in the collections of the Muséum national d’histoire naturelle, Paris, France (MNHN). A–C. Healdia mckittrickensis Crasquin sp. nov. A. Holotype, right lateral view of a carapace, sample 4 (GM5) (MNHN.F.F63365). B. Paratype, right lateral view of a carapace, sample GM1 (MNHN.F.F63366). C. External view of a right valve, sample 4 (GM5) (MNHN.F.F63367). – D–F. Healdia cutoffella Crasquin sp. nov. D. Holotype, right lateral view of a carapace, sample GM4 (MNHN.F.F63368). E. Paratype, external view of a left valve, sample GM1 (MNHN.F.F63369). F. External view of a left valve, sample GM4 (MNHN.F.F63370). –G–I. Sulcella mesopermiana Kozur, 1991.G. External view of a left valve, sample GM1 (MNHN.F.F63371). H. Left lateral view of a carapace, sample 2 (GM6) (MNHN.F.F63372). I. External view of a left valve, sample GM2 (MNHN.F.F63373). – J. Kirkbyidae gen. et sp. indet., right lateral view of a carapace, sample 4 (GM5) (MNHN.F.F63374). – K–L. Amphissites centronotus (Ulrich & Bassler, 1906).K. External view of a right valve, sample GM1 (MNHN.F.F63375).L. External view of a right valve, sample GM1 (MNHN.F.F63376). – M. Polytylites? sp., external view of a left valve, sample GM4 (MNHN.F.F63377). – N. Kindlella fissiloba Sohn, 1954, external view of a right valve, sample GM1 (MNHN.F.F63378). – O. Kindlella sp., external view of a left valve, sample GM1 (MNHN.F.F63379). – P–Q. Kindlella bellsundi Olempska & Błaszyk, 1996. P. External view of a right valve, sample 4 (GM5) (MNHN.F.F63380). Q. External view of a right valve, sample 4 (GM5) (MNHN.F.F63381) – R. Kirkbya sp., external view of a right valve, sample GM1 (MNHN.F.F63382). Scale bars: 100 µm.